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YAG（イットリウムアルミニウムガーネット） 1.686ctルース

YAG (Yttrium Aluminum Garnet) 7mm/1.686ct Loose Stone Sale price¥12,800
アルマンディンガーネット 2.421ctルース

Almandine garnet 2.421ct loose Sale price¥18,800
タンザニア産コーネルピンキャッツアイ 0.622ctルース

Tanzanian Kornerupine Cat's Eye 0.622ct Loose Stone Sale price¥4,980
カンテラオパール 5.204ctルース

Mexican Cantera Opal 5.204ct Loose Sale price¥12,800
コッパールチルクォーツ 1.410ctルース

Brazilian copper rutilated quartz 1.410ct loose stone Sale price¥8,800
コッパールチルクォーツ 1.560ctルース

Brazilian copper rutilated quartz 1.560ct loose stone Sale price¥8,800
コッパールチルクォーツ 1.381ctルース

Brazilian copper rutilated quartz 1.381ct loose stone Sale price¥8,800
ブラジル産コッパールチルクォーツ 1.991ctルース

Brazilian copper rutilated quartz 1.991ct loose stone Sale price¥6,980
雲母インクォーツ 0.980ctルース

Mica in Quartz 0.980ct Loose Sale price¥6,980
雲母インクォーツ 0.834ctルース

Mica in Quartz 0.834ct Loose Stone Sale price¥6,980
雲母インクォーツ 0.544ctルース

Mica in Quartz 0.544ct Loose Stone Sale price¥6,980
グリーンクォーツ 0.743ctルース

[Koshu Precious Stones plusthree] Green Quartz 6mm/0.743ct Loose with Patch Sale price¥25,800
【ムーンシュタイナー】パイライトインクォーツ 18.288ctルース

[Moonsteiner] Pyrite in Quartz 18.288ct Loose Sale price¥59,800
コーネルピンキャッツアイ 0.866ctルース

Tanzanian Kornerupine Cat's Eye 0.866ct Loose Stone Sale price¥5,980
タンザニア産コーネルピンキャッツアイ 1.539ctルース

Tanzanian Kornerupine Cat's Eye 1.539ct Loose Stone Sale price¥9,800
クリソベリルキャッツアイ 2.843ctルース

Chrysoberyl cat's eye 2.843ct loose Sale price¥39,800
ブラジル産デュモルチェライトインクォーツ 2.932ctルース

Brazilian Dumortierite in Quartz 2.932ct loose Sale price¥25,800
ブラジル産デュモルチェライトインクォーツ 1.894ctルース

Brazilian dumortierite in quartz 1.894ct loose Sale price¥19,800
ゴーシェナイト 0.866ctルース

Goshenite 6mm/0.866ct loose stone Sale price¥12,800
ゴーシェナイト 0.896ctルース

Goshenite 6mm/0.896ct loose stone Sale price¥12,800
ブラジル産デュモルチェライトインクォーツ 1.186ctルース

Brazilian dumortierite in quartz 1.186ct loose (faceted cut) Sale price¥12,800
ブラジル産デュモルチェライトインクォーツ 2.625ctルース

Brazilian dumortierite in quartz 2.625ct loose (faceted cut) Sale price¥26,800
ブラジル産デュモルチェライトインクォーツ 1.971ctルース

Brazilian dumortierite in quartz 1.971ct loose (faceted cut) Sale price¥19,800
ブラジル産デュモルチェライトインクォーツ 1.390ctルース

Brazilian dumortierite in quartz 1.390ct loose (faceted cut) Sale price¥15,800
ブラジル産デュモルチェライトインクォーツ 1.573ctルース

Brazilian dumortierite in quartz 1.573ct loose (faceted cut) Sale price¥18,800
合成モアッサナイト 0.372ctルース

Synthetic moissanite 0.372ct loose Sale price¥9,800
スリランカ産クリソベリルキャッツアイ 5.176ctルース

Chrysoberyl cat's eye from Sri Lanka 5.176ct loose Sale price¥198,000
コーネルピンキャッツアイ 0.513ctルース

Cornel pin cat's eye 0.513ct loose Sale price¥6,980
コーネルピンキャッツアイ 0.872ctルース

Cornel pin cat's eye 0.872ct loose Sale price¥6,980
【12530283掲載】カンテラオパール 17.221ctルース

Cantera opal 17.221ct loose Sale price¥25,800
Sold out [Jeweler's Tools] 3 black light loose pieces (ruby, red spinel rough, oil-in-quartz) with rechargeable battery

[Jeweler's Tools] 3 black light loose pieces (ruby, red spinel rough, oil-in-quartz) with rechargeable battery

Sold out Dragon Garnet 2-Stone Set (2.0mm, Round Cut) "Multiple Purchase Discount Available"

Dragon Garnet 2-Stone Set (2.0mm, Round Cut) "Multiple Purchase Discount Available"
Sold out Fukuoka SoftBank Hawks "Young Hawk Ring" - Single Type | SV925 Yellow Chalcedony -

Fukuoka SoftBank Hawks "Young Hawk Ring" - Single Type | SV925 Yellow Chalcedony -

Sold out グランディディエライト原石 1石

1 stone grandidierite rough stone from Madagascar《Multiple purchase discount available》

Sold out Dragon Garnet 1 stone (3.0mm, round cut)《Discount available for multiple purchases》

Dragon Garnet 1 stone (3.0mm, round cut)《Discount available for multiple purchases》
Sold out アイスブルーカラーの合成モアッサナイト1石ルース（5mm,アイスブルー）

Ice blue color synthetic moissanite 1 stone loose (5mm, ice blue)《Multiple purchase discount available》

Sold out クリソベリルキャッツアイ 1石（2月新誕生石）

Chrysoberyl Cat's Eye 1 stone (February new birthstone)

Sold out 1 stone loose quartz in oil from Pakistan《Discount available for multiple purchases》

1 stone loose quartz in oil from Pakistan《Discount available for multiple purchases》

Sold out American Anthill Garnet (Chrome Pyrope Garnet) 1 Stone Loose (Princess Cut, 2.5mm) {Multiple Purchase Discounts Available}

American Anthill Garnet (Chrome Pyrope Garnet) 1 Stone Loose (Princess Cut, 2.5mm) {Multiple Purchase Discounts Available}
Sold out [Use the #202509 Campaign] 2025 New Year's Lucky Bag 🎍 Gem Gacha Lucky Bag with 4 or more gemstones (worth ¥25,000) [Discount for bulk purchase of lucky bags]

[Use the #202509 Campaign] 2025 New Year's Lucky Bag 🎍 Gem Gacha Lucky Bag with 4 or more gemstones (worth ¥25,000) [Discount for bulk purchase of lucky bags]
Sold out 1 Dragon Garnet (4.0mm, round cut)

1 Dragon Garnet (4.0mm, round cut)

Sold out 1 stone loose quartz in oil from Pakistan《Discount available for multiple purchases》

1 stone loose quartz in oil from Pakistan《Discount available for multiple purchases》
Sold out Brazilian rutilated quartz (rutile/rutilated quartz (rutilated quartz)) 1 loose stone (3.0-3.5mm, for beginners) {Multiple purchase discounts available}

Brazilian rutilated quartz (rutile/rutilated quartz (rutilated quartz)) 1 loose stone (3.0-3.5mm, for beginners) {Multiple purchase discounts available}
Sold out Synthetic alexandrite 1 stone (round, mele size)《Discount available for multiple purchases》

Synthetic alexandrite 1 stone (round, mele size)《Discount available for multiple purchases》

Sold out 【宝石商の道具】冷却ヒビ入れ染色クォーツ・天然エメラルド見分け2点セット - KARATZ STORE｜カラッツSTORE

[Jeweler's Tools] Cooling Cracked Dyed Quartz/Natural Emerald Identification 2-piece Set (Discount available for multiple purchases)

Sold out ライモナイトインクォーツ（オーロラクォーツ） 1石 ルース

Lymonite in Quartz (Aurora Quartz) 1 stone loose

Sold out Fukuoka SoftBank Hawks "Young Hawk Ring" - Double Type | SV925, Yellow Chalcedony, White Chalcedony -

Fukuoka SoftBank Hawks "Young Hawk Ring" - Double Type | SV925, Yellow Chalcedony, White Chalcedony -

Sold out 《Limited to 15 Stones》Cordierite-Inclusive Cordierite Spinel Gacha, Equivalent to 59,800 Yen 《Bulk Purchase Discount Available》

《Limited to 15 Stones》Cordierite-Inclusive Cordierite Spinel Gacha, Equivalent to 59,800 Yen 《Bulk Purchase Discount Available》

KARATZ Custom Made

Why not take your favorite gemstone that you found at KARATZ and have it made into custom-made jewelry? It will be made by skilled Japanese craftsmen.
We carefully craft each piece of jewelry, starting with the stone setting, to match the individual characteristics of the gemstone.

KARATZ・Five Commitments

So that more people can feel closer to jewellery and enjoy it easily.
We will introduce KARATZ's thoughts on products, the attention to detail and efforts in selecting gemstones and creating jewelry.

KARATZ's Initiatives and Social Contributions

We will introduce KARATZ's efforts, including nurturing the next generation and business collaboration to develop the industry, and supporting children in Sri Lanka, the land of jewels.

KARATZ Books

These are books that KARATZ has been involved in writing, supervising, and planning. They are all books that allow you to enjoy gemstones from various angles. You can also purchase them directly.

jeweler's tools

For those who want to enjoy jewelry more but don't know what tools to use, we will introduce tools that are also used by KARATZ staff. You can also purchase them directly.